- Signs that You Need a Grow Tent Humidifier
- What’s the ideal indoor humidity for Cannabis in your Grow Tent?
- Where to Place a Humidifier for a Grow Tent
- What Size Humidifier is Best for a Grow Tent?
- Types of Humidifiers
- The Top 5 Humidifiers
- Additional Devices to Assist with Humidity
Signs that You Need a Grow Tent Humidifier
So, how can you know that you might need a humidifier for your grow tent?
One of the best signs that you need a consistent way to raise your grow tent’s humidity comes from your plants. If you start to find that your plants aren’t growing the way they used to during a more humid season, that might be a sign that they’re not in their optimal humidity level.
Humidity helps plants by spreading water vapor throughout the air. In addition, high humidity levels often contain high levels of carbon dioxide, which plants use for respiration. High humidity keeps water inside plants as they respirate, too, preventing them from losing water to a dry outside environment.
Another sign that your humidity level isn’t stable can be found in moisture that collects around grow lights. This moisture is condensation that occurs when the ambient temperature of your grow room decreases, causing water to solidify. This could be dangerous for many species of plants.
Dry soil is a final level that there’s not enough humidity in the room. If there isn’t enough water vapor in the air for plants to absorb, they might try to take some from the ground. This also absorbs nutrients from the soil, depleting the reserve of precious nutrients for later in the growing process and drying the soil out.
Putting a humidifier in your grow tent is a good idea if the climate inside has any chance of variation.
What’s the ideal indoor humidity for Cannabis in your Grow Tent?
Cannabis is a particular type of plant that requires specific conditions to grow in optimal time and health. Therefore, knowing the best humidity settings for a cannabis grow tent is integral to producing the plant in good amounts and in timely fashion. Because you need to be able to tell what humidity the grow room is at and where it climbs or falls, a humidistat or a humidifier with a humidistat is necessary.
There are two primary stages in cannabis’ lifespan which grow best under different humidity levels. The Vegetative Stage, when the plants are growing and expanding its leaves and roots, is best monitored with a “daytime” temperature of around 70-78 degrees F. When the lights are off at “night”, keep the temperature no more than 10-15 degrees cooler. Humidity during the Vegetative stage should be around 45%-55%.
During the Flowering State, when cannabis finishes its growing cycle, the daily temperature should be around 68-75 degrees F, with the same 10-15 degree fall at “night”, or when you shut the grow tent lights off. Humidity should be lowered to about 35%-45% to prevent mold, mildew, and rot formation.
When you finally dry your cannabis, you’ll want to return the temperature to about 65-74 degrees F and 45%-55% humidity. Never raise the temperature above 80 degrees, and never set humidity to over 90%, as this will cause rot and attract mold and mildew growth.
Where to Place a Humidifier for a Grow Tent
Grow tents are usually small spaces that are implemented to create “micro-environments” for plant species that need specialized conditions to grow properly. Humidifiers work the best when they are positioned such that they can affect the humidity of the entire target area.
Therefore, the most important aspect of humidifier placement is whether or not its vents cover all the directions of plant life. If your humidifier has multiple vents on many sides, placing the humidifier in the center of the grow tent is ideal. If it only has one vent, then placed in the corner, with the vent facing the majority of the plants, is best.
Overall, most humidifiers will spread their moisture evenly throughout the small tent regardless, but good positioning can improve the speed at which you see results.
What Size Humidifier is Best for a Grow Tent?
This depends on the size of your grow tent, of course. For instance, grow rooms that are less than 300 square feet will be able to use a small humidifier without a problem. Grow tents or rooms which are larger than 300 square feet should aim for larger, more powerful humidifiers with larger water tanks. Since most grow tents are below 300 square feet, small humidifiers are fine for the majority of people.
Types of Humidifiers
There are four types of humidifiers which you might consider using for your grow tent.
These use ultrasonic vibrations to evaporate warm or cool water vapor from a tank. These are usually very quiet and low maintenance, although you need pure, high-quality water for it to work well. Tap water sometimes produces dust thanks to particles that are common in general sink water. Many of these come with filters included to avoid this problem.
Cool Mist Humidifiers
These emit cool water vapor from regular water and use filters to remove dust particles or other impurities. They’re easy to clean and are great for plants that need high humidity but low ambient temperature. They can be very noisy, however, and require more maintenance.
Warm Mist Humidifiers
These are cheap humidifiers that are also the most common type. They release warm water vapor into the air by heating water in their tanks into steam, then spilling it into the surrounding area. These do require somewhat frequent cleaning and only cover small areas.
These use airflow to make water vapor by soaking a piece of cloth via their water tank, then blowing air from a fan over the cloth. These are very inexpensive and produce clean vapor, but they require frequent cleaning themselves and regular filter replacement.
The Top 5 Humidifiers
|Humidifier||Tank Size||Sq Feet||Mist Type||# of Mist Settings||Nozzle Type||Timer||Humidistat|
|GENIANI Ultrasonic Cool Mist Humidifier||4L||Over 300||Warm or Cool||12||Rotating||Yes||No|
|Polardo Ultrasonic Cool and Warm Mist Humidifier||4L||485||Warm or Cool||12||Fixed||No||No|
|ITvanila Ultrasonic Humidifier||5L||Over 300||Cool||3||Fixed||No||Yes|
|iTvanila Ultrasonic Cool Mist Humidifier||2.7L||Well over 300||Cool||2||Rotating||No||No|
|TTLIFE Portable Humidifier||5.5L||Well over 300||Warm and cool||2||Rotating||Yes||Yes|
Due to its size, this humidifier is a great pick for grow tents around 8×8 or 64 square feet due to its rotatable nozzle, so you can adjust the stream of its vapor emissions. It’s tall and stable, and the controls are easy to reach. It comes with auto shut-off controls and doesn’t need filters to keep its water supply clean and pure.
- Night Light
- Large water tank
- Auto Shut-Off
- 360-degree nozzle
- A little bulky
- Size: 14×9.2×9.2 inches
- Weight: 3.75 pounds
- Warranty: 2 years
This air humidifier is a great piece of equipment thanks to its multitude of vapor settings. You can fine-tune the kind of mist you’re getting with its intuitive controls. In addition, it uses air ionization to remove dirt particles before they join the water vapor of your grow room.
- Ionization filters
- Low energy consumption
- Very quiet
- Many vapor settings
- Extra features aren’t necessary, a little pricey
- Size: 12x9x9 inches
- Weight: 4.36 pounds
- Warranty: 1 Year
This tall, narrow humidifier is one of the best humidifiers for 4×4 grow tents or small grow tents thanks to its tall, narrow shape. This means you can set it up even if the floor of the grow tent is crowded. It can produce warm or cool vapor depending on your needs and is equipped with a humidistat to prevent the air from becoming too moist or not moist enough.
- Great design
- Large water tank
- Tall shape might not fit all tents
- Size: 7.4×7.4×15.7 inches
- Weight: 3.3 pounds
- Warranty: 1 year
This is a great humidifier for medium-sized or larger grow tents since its nozzle can rotate 360 degrees. Controlling the humidifier is easy with its touch panel. It also has a few different vapor modes and can be set to become extremely quiet.
- Great nozzle that turns 360 degrees
- Easy controls
- Very quiet
- Water tank isn’t very large
- Size: 12.9×7.9×7.9 inches
- Weight: 2.97 pounds
- Warranty: N/A
This humidifier is pricey but worth the cost. It’s a humidifier with a timer and humidistat, ensuring that you can totally control the humidity in your grow tent with a small, handy remote. The tank is large and the water that comes out of the nozzle is well-filtered. Finally, the humidifier runs quietly, too, and can give your grow tent warm or cool vapor depending on your plants’ needs.
- Excellent remote and controls
- Warm or cool vapor
- Night light
- Large tank
- Size: 24.8×19.7×15 inches
- Weight: 6.9 pounds
- Warranty: 2 years
Additional Devices to Assist with Humidity
Now that you’ve seen some great humidifiers, keep in mind that there are some other tools that can help you maintain optimal air humidity in your grow tent. Some of these might be fans, like this one, for larger tents that need vapor to be spread evenly, and precise humidity measuring devices, like this one, to let you know when you need to turn the humidity up or down. You can also use hoses to get water into your humidifier from outside the grow tent, preventing you from having to refill the tank every so often.
Humidifiers are best used in conjunction with other devices and good gardening practices. Keep all of what we discussed in mind, and your grow tent will be a great place for plants to thrive.
Humidifiers are a great tool to keep your grow tent as healthy an environment for your plants as possible. They’re easy to use and although they might cost a little up front, they’re well worth it in the end. We hope we’ve helped find the perfect grow tent humidifier.